Snap-fastener.



H. J. DOBSON. V

SNAP FASTENER- APPLICATION man 001. 31. 1916p 1 346,069., I Pabilted Nov. 13, 1917;

WI M588 .1 IN I/E/V TOR.

I freedom of action of the spring and yet nuerr zmivrns' noBsoN, OF NEWARKLNEW Jnnsn'ri Y swi m ng Y Application filed October-31, 191 6. 'serial'naxiaaes.

Tocll'wh-bm it maycoa'oem R r Be it known that I, HUGH'J. DOBSON,;.H citizen of the United States. of America, and a resident of Newark, county of Essex, in the State of New J ersey, ha ve inventedcertainnew and usefullmprovements in Snap- Fasteners, of which the following is a specification.

The objects of this invention'are to ob tain a snap fastener of simplified and an:

proved construction; to provide an improved spring for the socket member, and improved means for retaining the same in said socket member; to secure a spring which always acts with'a substantially constant bowing tension; to obtain maximum hold it securely in position on the socket member; to secure great efliciency and ease of operation, and to secure other advantages and results as may be brought out in the following description.

'Referring to the accompanying drawings, to which like numerals. of reference indicate the same parts throughout the several views;

Figure 1 is an enlarged view of a snap fastener of my improved construction;

Fig. 2 is a section on line 22 of Fig. 1; 'Fig. 3 is a section on line 33 of Fig. 2;

Fig. 4 is a view of the socket member alone, looking at its side which is sewed to a garment;

' Fig. 5 is a section on line 55 of Fig. 4;

Fig. 6 is arface view of the socket member, looking at the side which is'exposed in use;

Fig. 7 is a face view of the stud member, showing its side which is exposed in use;

Fig. 8 is a transverse section on line 88 of Fig. 7, and

Fig. 9 is a view of the stud member, looking at, its side which is sewed to a garment.

In the specific embodiment of the invention illustrated in said drawings, the reference numeral 1 indicates the socket member and the reference numeral 2 indicates the stud member of my improved fastener.

The socket member, shown more particularly in Figs. 4-6, is preferably circular and of sheet metal, having a disk-like body 3 and an inwardly bent or curled flange 4 at the periphery thereof, forming a peripheral recess 5 opening. toward the center of the socket member in the plane of the same. At-

the middle of the socket member is a central Specification of Letters I atent. P3,

'- spring f8 arranged tense Nev. 13, 191i?! aperture 6:through*whichwthehead7i ofithe studmember. 2 may be'inserted from either side of the socket. member, and-resilient means are. provided 011113116 socket member for releasably engaging saidhead andhold ing it against inadvertent withdrawal. f

Asa-shown in the drawings, the; resilient a holding means comprises a narrow U-shaped the same from which the flange 4 projects,

diametrically Fof-cn-thje *socket' member, flatwise upon the side of and having its opposite ends underlying said flange. This secures the spring against any escape from the position designated, since although it might rotate with respect to the disk, if its ends are loose enough underthe flange, it will always lie diametrically thereof. Preferably the open end of the U-' shaped spring 8 is loose enough under the said flange 4 forthe arms 9,9 of the spring to move toward each other from their normal position, which is preferably substantially parallel to each other. The normal distancebetween the said arms 9, 9, when they are parallel, is enough less than the diameterof the head 7 ofthe stud member, so that when the two membersof the fastener are pressed together, said head will force the arms 9, 9 apart and be frictionally held therebetween by virtue of said. arms closing again upon the neck 10 ofthe' stud. V Pref-.-

erably, in order to increase the resiliency of the arms 9,9 of the U-shaped spring 8, the extremities of the free ends of said arms engage the bottom wall of the peripheralflange 4 to limit the separation of said ends I beyond the normal position of said arms heretofore described; in this way, insertion of the head 7 to pass between the two'arms,

will bow said arms from their extremities to the closed end of the spring. This will be true no matter from which side of the socket member the stud member is inserted,

because the arms of the spring are substan-' tially straight and held at their opposite ends. If the stud member is inserted from the opposite side of the disk-like body from the spring, obviously the arms may bow outward from the body portionsomewhat as they bow apart, in a direction oblique to the plane of the fastener, but the bowing will be none the less a true bowing of the arms from end to end. is inserted from the spring side of the body, of course the arms can bow only apart in the plane of the fastener, but obviously how- When the stud member,

ever the stud member is inserted; a bowing v U-shaped spring with substantially Copies of this pat ent may be obtained for straight arms held the plate at its bowed end and the extremities of said arms only by said flange,'- said arms normally overlying opposite edges of the aperture, whereby the arms of the spring always act with a substantially constant bowing tension'whichever side of the socket member the stud member is-inserted from.

In testimony whereof I have signed this specification in the presence of tWo subscribing witnesses. to o i a I "I'HUGH JAMES DOBSON;

'Witnessesi I HOWARD. P. Kine,

MILDRED E. Bnoonsk five cents each, by'addressing the' Commissionercrib/tents, Washington,1 .0. p 1 a 

